Prime

Back in the 1990s there was an upstart comic book company called Malibu. Malibu fell on hard times and eventually ended up being sold to Marvel. During its heyday Malibu produced a number of really good comics but their biggest seller was the character of Prime. Prime is childhood fantasy 101. Scrawny tween Kevin Green develops the power to transform into the overly muscled form of his ideal super-hero. In his Prime form Kevin has super-strength, invulnerability and can fly. Kevin basically can turn himself into a roided out version of Superman (or more accurately he is a bit of a riff on the character Shazam) while maintaining his own tweenage brain and personality. You can just imagine the trouble that a kid with that kind of power would end up getting into.